====== Calibrating the Touch Screen ======

===== GUI (Bookworm) =====

The ComfilePi Bookworm OS now contains a GUI application available from the //ComfilePi// menu that you can use to start the touchscreen calibration program from the desktop.

{{ :comfilepi:calibrating_the_touch_screen:touch_calibration_gui.png }}

===== Command Line Interface (All OS Variants) =====


To calibrate the ComfilePi's touchscreen, simply run the following command from the ComfilePi's desktop.

<code>
sudo /opt/ComfileTech/touch/rpi-AR1100/AR1100 -c 4
</code>

This will display a sequence of 4 crosshairs that need to be accurately touched to perform the calibration.  After the calibration, the mouse device will be re-enumerated, so the touch-beep may no longer sound when the screen is touched.  To remedy that, either reboot the ComfilePi, or restart the touch-beep service with the following command:

<code>
sudo systemctl restart touch-beep.service
</code>

{{ :comfilepi:calibrating_the_touch_screen:touch_calibration.mp4?800x450 |}}

If the touchscreen no longer works after calibrating, please try running the following command to force it to re-enumerate in mouse mode, and then reboot.

<code>
sudo /opt/ComfileTech/touch/rpi-AR1100/AR1100 -m
</code>

===== Kivy =====

It has been reported to us that to achieve accurate touch events in Kivy the following lines may need to be added to the ''[input]'' section of the ///home/pi/.kivy/config.ini// file.

<code>
mouse = mouse 
mtdev_%(name)s = probesysfs,provider=mtdev

hid_%(name)s = probesysfs,provider=hidinput 
</code>

[[https://www.instructables.com/Resistive-Touch-Screen-on-Raspberry-Pi/|Reference]]

[[comfilepi:index|ComfilePi - Industrial Raspberry Pi Panel PC]]